<template>
    <div class="count-box">
        <button class="minus" @click="handelSub">
            -
        </button>
        <input :value="value" @change="handleChange" type="text" class="inp">
        <button class="add" @click="handelAdd">
            +
        </button>
    </div>
</template>

<script>
export default {
    props: {
        value: {
            type: Number,
            default: 1
        }
    },
    methods: {
        handelSub() {
            if (this.value <= 1) {
                return
            }
            this.$emit('input', this.value - 1)
        },
        handelAdd() {
            this.$emit('input', this.value + 1)
        },
        handleChange(e) {
            const num = +e.target.value

            if (isNaN(num) || num < 1) {
                e.target.value = this.value
                return
            }

            this.$emit('input', num)
        }
    }
}
</script>

<style lang="less" scoped>
.count-box {
  width: 110px;
  display: flex;
  .add, .minus {
    width: 30px;
    height: 30px;
    outline: none;
    border: none;
    background-color: #efefef;
  }
  .inp {
    width: 40px;
    height: 30px;
    outline: none;
    border: none;
    margin: 0 5px;
    background-color: #efefef;
    text-align: center;
  }
}
</style>